Bug 489403 - Launch feedback cursor animation icon appears pixelated with fractional scale
Summary: Launch feedback cursor animation icon appears pixelated with fractional scale
Status: CONFIRMED
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (show other bugs)
Version: 6.1.1
Platform: Fedora RPMs Linux
: NOR minor
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-06-28 20:55 UTC by Pavel Dobiáš
Modified: 2025-02-19 07:06 UTC (History)
6 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
Launch animation pixelation showcase (758.16 KB, video/mp4)
2024-06-28 20:55 UTC, Pavel Dobiáš 		Details
Recording of the bug at 225% display scale (1.13 MB, video/x-matroska)
2024-07-11 09:13 UTC, Pavel Dobiáš 		Details
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Description Pavel Dobiáš 2024-06-28 20:55:58 UTC 
Created attachment 171148 [details]
Launch animation pixelation showcase

SUMMARY
When using fractional scaling factor (e.g. 125%), icon animation shown next to the cursor when opening an app appears pixelated. 

STEPS TO REPRODUCE
1. Set launch feedback cursor animation (e.g. to bouncing).
2. Open an application from the task manager.
3. Observe the animation near the cursor.

OBSERVED RESULT
The icon appears pixelated. See attached video for reference.

EXPECTED RESULT
The icon appears clearly.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 40 KDE Spin
KDE Plasma Version: 6.1.1
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.1

ADDITIONAL INFORMATION
Display: 1920x1080@125%
Comment 1 Nate Graham 2024-07-03 00:14:34 UTC 
With every app, or just Steam?
Comment 2 Pavel Dobiáš 2024-07-05 14:51:04 UTC 
(In reply to Nate Graham from comment #1)
> With every app, or just Steam?

Every app, I used Steam as an example.
Comment 3 Nate Graham 2024-07-10 20:51:57 UTC 
Probably an XWayland integration issue, then.

I don't notice it at 225% scale, FWIW. It's possible it's happening but I'm just not noticing due to the high scale factor and short duration of the animation.
Comment 4 Pavel Dobiáš 2024-07-11 09:12:23 UTC 
(In reply to Nate Graham from comment #3)
> Probably an XWayland integration issue, then.
> 
> I don't notice it at 225% scale, FWIW. It's possible it's happening but I'm
> just not noticing due to the high scale factor and short duration of the
> animation.

How is it an XWayland issue though? It happens to even native Wayland apps. Is it that the component for launch feedback animation runs in XWayland? Also I tried setting my display size to 225% and I can still see it, but my monitor is small so it's easier to see.
Comment 5 Pavel Dobiáš 2024-07-11 09:13:25 UTC 
Created attachment 171561 [details]
Recording of the bug at 225% display scale

Recording of the bug at 225% display scale
Comment 6 Nate Graham 2024-07-22 21:14:49 UTC 
Oh hey, you're right. Indeed, nothing to do with XWayland. Can reproduce if I actually look at it properly. :)
Comment 7 Pavel Dobiáš 2024-07-22 21:17:34 UTC 
(In reply to Nate Graham from comment #6)
> Oh hey, you're right. Indeed, nothing to do with XWayland. Can reproduce if
> I actually look at it properly. :)

Great, I hope it's gonna get fixed in the future.
Comment 8 gudvinr+kde 2025-02-19 07:06:49 UTC 
Still an issue. Thunderbird launch icon looks like a mess even with 125% scale. But not very noticeable with Dolphin.

Operating System: Arch Linux 
KDE Plasma Version: 6.3.1
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.2-arch1-1 (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX Vega M GL Graphics